Arc Systeme Safety Release AidUseful in complete safety Achieve holding times (on advice from your coach), Check your draw length, Control cam timing and cam lean, Tie a D loop, Find field distances. To avoid damaging the nocking point, always place a nock before drawing (acts like a martyr). Maximum authorized bow weight : 75 lbs. Anodized aluminum, Black color, One size (medium). Supplied without thumb hold.